hello, Ineke ~ yes, Malia HAS been around since the 60s, and this dress certainly has some 60s elements, however, that care label is much more recent.
your dress is adorable, i love the print and the colorway, however, in the 90s there was a huge resurgence of retro styling in the Hawaiian apparel industry; i would date this dress to that time period, the 90s at the very oldest, and it could very well be newer than that.